Thread cutting machine



July 10, 1934. H. T. KIMLJN ET AL 7 1,966,124

THREAD CUTTING MACHINE Filed July 24, 1933 Harry 7: KimHn ,DouglesOriando Kamh'n.

Harry T Kimh'n sh,

lnncutors.

attorney Patented July 10, 1934 UNETED STATES PATENT FFME THREAD CUTTINGMACHINE Application July 24, 1933, Serial No. 681,820

2 Claims.

This invention relates to a pipe threading machine, and moreparticularly to a power actuated device for operating the usual ratchettype of thread cutting die stock, although the device may also be usedfor operating a pipe or tube cutter of the rotary ratchet type.

While we have herein illustrated our invention in the form of aself-contained unit, it is to be understood that the same may be mountedon a bench or upon a truck or other suitable support and operated inother suitable ways.

The object of the invention, is to provide a simple, compact and durablemechanism whereby the usual type of ratchet operated pipe threading diestock or head may be rotated by a power driven device.

Another object of our invention, is to provide means whereby the speedat which the die head is rotated may be adjusted to vary such speed ofrotation, depending upon the size of pipe to be threaded and otherconditions.

Another object of the invention is to provide means whereby the threadedend of the pipe may be internally reamed during the operation ofthreading.

Also while we have not illustrated or described any mechanism for thepurpose, it is understood that the machine may be equipped with asuitable automatic oiling or lubrication compound feeding means for thecutters, and also a ratchet type of pipe cutter may be interchanged withthe threading die, for cutting pipe, tubing, etc.

As the pipe vice which we employ as well as the ratchet operated threadcutting die head, are

both of the standard type, we do not consider that it is necessary todescribe these in detail, as others may be used in their place ifdesired.

With these and other objects in view, our invention consists in certainnovel construction and combination of parts as will hereinafter be fullydescribed and claimed, and illustrated in the accompanying drawing, inwhich like figures of reference refer to corresponding parts in all ofthe views, and it is understood that slight changes may be made therein,without departing from the spirit of the invention.

In the drawing:

Figure 1 is a front elevation of the device.

Figure 2 shows a side elevation of the same.

Figure 3 shows a top plan view.

Figure 4 shows a cross sectional View, taken on the line 4-4 of Figure2.

Referring to the drawing, the machine comprises a base 10, to which aresecured the four legs 11 of angle iron or other suitable material,

by the bolts 12; these legs 11 inclining inwardly and being secured to atop or table 13 by the bolts 14, while to the two front legs is securedby the bolts 15 a bearing plate 16; a corresponding plate 17 beingsecured to the two rear legs in like 0.

manner.

Mounted upon the table 13, is a pipe vice 18 of the usual style providedwith the handle 19, and within this pipe vice 18 is held the pipe to bethreaded. 1

Upon the forward end of the pipe 50 is placed the threading head 20,which is formed with the ratchet part and the cutter or die 21; theratchet part 20 being provided with the operating lever 22, and thecontrol catch 23, all of which is of standard design.

To the side bearing plates 16 and 1'? is secured a support 24 upon whichis mounted the electric motor 25, which is supplied with the pulley 26.

Within the bearing plates 16 and 17 are journaled the shafts 27 and 30in parallel relation with each other, and upon the shaft 2'7 is securedthe belt pulley 28 which is driven by the belt 29 from the motor pulley26, and the end of the shaft 27 projects from the plate 16 and hassecured 33 thereon a gear pinion 31, which is in mesh with and drives agear wheel 32 secured upon the projecting end of the shaft 30.

This gear 32 is in the form of a disk or plate and carries a stud 34,upon which is pivoted the lower end of the connecting rod 35, the upperend of which is pivoted as at 36 to a clamp 3'7 mounted on the lever 22in an adjustable manner by a cam lever 38 or other suitable device insuch a manner that the stroke of the lever 22 may be varied to vary thespeed of the cutter head.

The motor 25 is wired by the wires 42 to a switch 39 mounted on one ofthe legs 11, and a plug 40 also mounted on the leg 11, carries theservice wires 41. 95

The operation of the device is as follows The pipe 50 to be threaded isclamped in the vice 19 by the screw handle 19; the threading head 20 isplaced on the projecting end of the pipe with the cutter die 21 incontact therewith and the thumb screws 9 are tightened to hold the diein place; the clamp 37 is now secured in the desired position upon thelever 22 by the cam lever 38, and the switch 39 is turned to the onposition. v

The motor 25 through the pulley 26 belt 29 and pulley 28 will rotate theshaft 27, and the pinion gear 31 which in turn will rotate the gear 32and shaft 30, causing the lower end of the connecting rod 35 to rotatewith the gear 32, which will recip- 110 rocate the rod 25 and cause thelever 22 to be moved up and down, which will operate the ratchetmechanism of the threading head 20 to cut the threads.

As the operator does not have to give his attention to the operation ofthe cutter, he is free to keep the die lubricated during the act ofcutting, and he may also be free to hold an internal reamer in the endof the pipe 50 to remove the burr therefrom.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. In a pipe threading machine, in combination with a supporting framehaving a pipe vice and a threading die mounted thereon, of means forrotating the threading die, comprising a rotatable shaft mounted in saidframe and means for rotating the same, a pinion gear carried by saidshaft, a second shaft rotatably mounted in said frame, a plate-gearcarried by said shaft and in mesh with and driven by the pinion gear, anoscillating lever having operating connection with the die for rotatingthe latter and a connecting rod pivoted to said gear-plate and to theoscillating lever of the threading die.

2. In a pipe threading machine, in combination with a supporting framehaving a pipe vice and thread cutting die head mounted thereon, of meansfor rotating said die head comprising a shaft rotatably mounted in saidframe and means for rotating the same, a pinion gear carried by saidshaft, a second shaft rotatably mounted in said frame, a plate-gearcarried thereby in mesh with and rotated by said pinion, an oscillatinglever having operating connection with the die for rotating the latter aconnecting rodhaving one end pivoted to said plate gear and the otherend pivoted to the oscillating lever of the die head in an adjustablemanner to vary the speed of the rotation of said die head.

HARRY T. KIMLIN. DOUGLAS ORLANDO KIMLIN. HARRY T. KIMLIN, JR.

